[LU-9884] lustre servers running rhel6.8 miss ldiskfs kernel patches

• Status: Resolved
• Project: Lustre
• Affects Version/s: Lustre 2.7.0, Lustre 2.9.0
• Type: Bug
• Priority: Major
• Reporter: Jay Lan (Inactive)
• Assignee: Yang Sheng
• Resolution: Fixed

Environment

lustre servers in rhel/centos 6.8.

• Severity: 2

Description

In recent incidents (LU-9410) we found our lustre 2.7.3 servers on CentOS 6.8 missed one ldiskfs kernel patch; "ext4-corrupted-inode-block-bitmaps-handling-patches.patch".

So, I compared the ldiskfs-2.6-rhel6.7.series with ldiskfs-2.6-rhel6.8.series. Well in addition to the one above, there are two more ldiskfs kernel patches landed to 6.7 did not make to 6.8:
rhel6.4/ext4-fix-mbgroups-access.patch
rhel6.3/ext4-fix-ext4_mb_add_n_trim.patch

Please advise if I need these two patches...
Lustre-2.9.0 running on rhel6.8 would also miss these three patches.

Comments

[Peter Jones]

Yang Sheng

Can you please advise as to whether the referenced patches are needed for RHEL 6.8?

Jay

RHEL 6.x servers are not officially support on Lustre 2.9

Thanks

Peter

[Jay Lan (Inactive)]

Thank you Peter.
So, forget about 2.9.0. Our planning server version is 2.10.0 running CentOS 7.3.

[Yang Sheng]

Hi, Jay,

Looks like "ext4-corrupted-inode-block-bitmaps-handling-patches.patch" has been landed to rhel6.8.
rhel6.8 has back-ported this change from upstream. So ext4-fix-mbgroups-access.patch needn't anymore.
Also for ext4-fix-ext4_mb_add_n_trim.patch, rhel6.8 has fixed this problem in other approach. So we remove it from rhel6.8 series.

Thanks,
YangSheng

[Jay Lan (Inactive)]

Hi Yang,

Thanks for your investigation!

I confirmed that the rhel6.8 codes where affected by both ext4-fix-mbgroups-access.patch and ext4-fix-ext4_mb_add_n_trim.patch were implemented differently, so the patches are either no longer needed or no longer appliable.

But for the record, ext4-corrupted-inode-block-bitmaps-handling-patches.patch is not in the rhel 6.8 kernel code nor in the b2_7_fe ldiskfs/kernel_patches/series/ldiskfs-2.6-rhel6.8.series. I added the patch to ldiskfs-2.6-rhel6.8.series for NASA only.

You addressed my question wrt that two patches. Thanks, and please close the ticket.

[Peter Jones]

Thanks Jay!